Half Price Standard Code

Specification for Line Pipe, First Edition
standard by American Petroleum Institute, 01/01/1928

Specification for Line Pipe, Fortieth Edition
standard by American Petroleum Institute, 11/01/1992

Errata 1 to Recommended Practice for Pipeline Operator Qualification (OQ), Fifth Edition
Amendment by American Petroleum Institute, 05/01/2022

Brushless Synchronous Machines – 500 kVA and Larger, Fourth Edition
standard by American Petroleum Institute, 05/01/2022

Specification for Line Pipe, Twentieth Edition Includes Errata
standard by American Petroleum Institute, 03/01/1963

Specification for Line Pipe, Seventh Edition
standard by American Petroleum Institute, 04/01/1940

General-purpose Steam Turbines for Petroleum, Chemical, and Gas Industry Services, Sixth Edition
standard by American Petroleum Institute, 06/01/2022

Specification for Line Pipe, Twenty-second Edition Includes Errata
standard by American Petroleum Institute, 03/01/1967

Recommended Practice for the Design, Testing, and Operation of Subsea Multiphase Flow Meters, Second Edition
standard by American Petroleum Institute, 05/01/2022

Specification for Valves, Twenty-Fifth Edition, Includes Errata 1 (2021) and Errata 2 (2022)
standard by American Petroleum Institute, 11/01/2021